test_scheduler.py: Error if Izumi nag without debug

[samsrabin]

There is a long-standing bug, extremely difficult to diagnose, where building CESM will fail using the nag compiler on Izumi if you didn't enable debug mode. This PR makes it so that tests with such a configuration will fail with a useful error message.

Test suite:
Test baseline:
Test namelist changes:
Test status: [bit for bit, roundoff, climate changing]

Fixes [CIME Github issue #]

User interface changes?: No

Update gh-pages html (Y/N)?: No

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[samsrabin]

It looks like there is at least one CESM test that uses izumi nag without debug. From testlist_cam.xml:

  <test compset="QPC6" grid="ne5pg3_ne5pg3_mg37" name="ERP_Ln9" testmods="cam/outfrq9s_clubbmf">
    <machines>
      <machine name="izumi" compiler="nag" category="aux_cam"/>
    </machines>
    <options>
      <option name="wallclock">00:10:00</option>
    </options>
  </test>

I'm not seeing this test in any expected failure list, so maybe it'd be better to do this check in CTSM instead. @ekluzek

[ekluzek]

Yeah, I see that test and a few others that use izumi_nag without debug in CESM tests:

from:

./query_testlists --xml-compiler nag --xml-machine izumi

for lines without "_D"

aux_cam           : ERP_Ln9.ne5pg3_ne5pg3_mg37.QPC6.izumi_nag.cam-outfrq9s_clubbmf                                                  
aux_cmeps         : ERP_Ln9.ne5pg3_ne5pg3_mg37.QPC6.izumi_nag.cam-outfrq9s_clubbmf                                                  
aux_cmeps         : ERP_Ln9.ne5pg3_ne5pg3_mg37.QPC6.izumi_nag.cam-outfrq9s_clubbmf                                                  
aux_glc           : IRT_Ly5_P24x1.f09_g17_ais8gris4.T1850Gag.izumi_nag                                                               # Include a multi-ice sheet IRT test to test saving and restoring interim restart files to/from the archive (partly because the specification of interim restart file patterns for multiple ice sheets in config_archive.xml is a bit tricky).
waccm             : ERP_Ln9.f10_f10_mg37.QPWmaC6.izumi_nag.cam-outfrq9s_mee_fluxes 

So we don't want to mess those tests up, and should just do a CTSM only solution.

[ekluzek]

The change looks good. It looks like it makes it easy to see what to do. But, it is really specific to a specific CESM case.